ExpressionTask 类

Contains the members used to configure and run an Expression task.

继承层次结构

System.Object
  Microsoft.SqlServer.Dts.Runtime.DtsObject
    Microsoft.SqlServer.Dts.Runtime.Task
      Microsoft.SqlServer.Dts.Tasks.ExpressionTask.ExpressionTask

命名空间：  Microsoft.SqlServer.Dts.Tasks.ExpressionTask
程序集：  Microsoft.SqlServer.ExpressionTask（在 Microsoft.SqlServer.ExpressionTask.dll 中）

语法

声明
<GuidAttribute("2EE7D9A9-DA39-4F6F-A1E4-804F1FBC544C")> _
Public Class ExpressionTask _
    Inherits Task _
    Implements IDTSBreakpointSite, IDTSSuspend, IDTSComponentPersist
用法
Dim instance As ExpressionTask

[GuidAttribute("2EE7D9A9-DA39-4F6F-A1E4-804F1FBC544C")]
public class ExpressionTask : Task, 
    IDTSBreakpointSite, IDTSSuspend, IDTSComponentPersist

[GuidAttribute(L"2EE7D9A9-DA39-4F6F-A1E4-804F1FBC544C")]
public ref class ExpressionTask : public Task, 
    IDTSBreakpointSite, IDTSSuspend, IDTSComponentPersist

[<GuidAttribute("2EE7D9A9-DA39-4F6F-A1E4-804F1FBC544C")>]
type ExpressionTask =  
    class 
        inherit Task 
        interface IDTSBreakpointSite 
        interface IDTSSuspend 
        interface IDTSComponentPersist 
    end

public class ExpressionTask extends Task implements IDTSBreakpointSite, IDTSSuspend, IDTSComponentPersist

ExpressionTask 类型公开以下成员。

构造函数

	名称	说明
	ExpressionTask	Initializes a new instance of the ExpressionTask class.

页首

属性

	名称	说明
	DebugMode	Gets or sets a Boolean that indicates whether a task should determine whether breakpoints are enabled.
	ExecutionValue	Returns the result of the task execution. （覆盖 Task.ExecutionValue。）
	Expression	Gets or sets the expression to be executed by the task.
	SuspendRequired	Gets or sets a Boolean that indicates whether tasks should suspend when they encounter a breakpoint. This value is set by the runtime engine for tasks and containers when a breakpoint is encountered.
	Version	*** Member deprecated; see Remarks. ***    Returns the version of the task. This property is read-only. （从 Task 继承。）

页首

方法

	名称	说明
	AcceptBreakpointManager	Called by the run-time engine when a task or container is created, and is passed a BreakpointManager to enable the task to create, remove, and check the status of breakpoints. This method is called by the runtime and is not used in code.
	CanUpdate	*** Member deprecated; see Remarks. ***    A Boolean that indicates whether the new package XML can update the old package XML. （从 Task 继承。）
	Equals	Determines whether two object instances are equal. （从 DtsObject 继承。）
	Execute	Runs the task. （覆盖 Task.Execute(Connections, VariableDispenser, IDTSComponentEvents, IDTSLogging, Object)。）
	Finalize	（从 Object 继承。）
	GetConnectionID	Gets a String containing the ID of the connection. （从 Task 继承。）
	GetConnectionName	Gets a String containing the name of the connection. （从 Task 继承。）
	GetHashCode	Returns the hash code for this instance. （从 DtsObject 继承。）
	GetType	（从 Object 继承。）
	InitializeTask	Initializes the properties associated with the task. This method is called by the runtime and is not used in code. （从 Task 继承。）
	LoadFromXML	Loads the definition of the task, in XML format, from the XML definition of the package.
	MemberwiseClone	（从 Object 继承。）
	ResumeExecution	Resumes execution of the task after pausing. The task or container is resumed by the runtime engine.
	SaveToXML	Saves the definition of the task, in XML format, into the XML definition of the package.
	SuspendExecution	Indicates that the executable needs to suspend. This method is called by the runtime engine.
	ToString	（从 Object 继承。）
	Update	*** Member deprecated; see Remarks. ***    This method updates the old package XML with the new package XML if CanUpdate is set to true. （从 Task 继承。）
	Validate	Verifies that the task is properly configured. （覆盖 Task.Validate(Connections, VariableDispenser, IDTSComponentEvents, IDTSLogging)。）
	ValidateExpression	Verifies that the expression is properly configured.

页首

线程安全

此类型的任何公共 static（在 Visual Basic 中为 Shared） 成员都是线程安全的。不保证所有实例成员都是线程安全的。

请参阅

参考

Microsoft.SqlServer.Dts.Tasks.ExpressionTask 命名空间